In Graz, Austria, there are several top virtual currency trading platforms that cater to both experienced traders and beginners. Some of the top platforms include:

1. Bitpanda: Bitpanda is a popular cryptocurrency exchange platform in Austria that allows users to buy, sell, and trade a wide range of cryptocurrencies, including Bitcoin, Ethereum, and more. It is known for its user-friendly interface and secure trading environment.

2. Coinfinity: Coinfinity is another well-known cryptocurrency exchange in Austria that offers a variety of trading options for users. They provide a secure platform for buying and selling cryptocurrencies with a focus on customer service and transparency.

3. Anycoin Direct: Anycoin Direct is a European cryptocurrency exchange platform that also serves customers in Austria. They offer a wide range of cryptocurrencies for trading and provide a simple and secure trading experience for users.

4. Coinmerce: Coinmerce is a popular cryptocurrency exchange platform in Austria that offers a user-friendly interface and a wide range of cryptocurrencies for trading. They also offer a mobile app for convenient trading on the go.

5. Kraken: Kraken is a global cryptocurrency exchange platform that is available to users in Austria. They offer a variety of trading options, including margin trading, and have a reputation for security and reliability.

6. Binance: Binance is one of the largest cryptocurrency exchanges in the world and is available to users in Austria. They offer a wide range of cryptocurrencies for trading and have a reputation for low fees and high liquidity.

7. Coinbase: Coinbase is a popular cryptocurrency exchange platform that is available to users in Austria. They offer a simple and secure platform for buying, selling, and trading cryptocurrencies, as well as a user-friendly mobile app.

8. Bitstamp: Bitstamp is a well-established cryptocurrency exchange platform that is available to users in Austria. They offer a secure trading environment and a variety of trading options for users.

9. eToro: eToro is a social trading platform that offers cryptocurrency trading to users in Austria. They offer a unique copy trading feature that allows users to automatically copy the trades of successful traders.

10. CEX.IO: CEX.IO is a cryptocurrency exchange platform that is available to users in Austria. They offer a variety of trading options, including margin trading, and have a reputation for security and reliability.

Overall, these are some of the top virtual currency trading platforms in Graz, Austria that cater to a wide range of traders and offer a variety of trading options. Users should research and compare these platforms to find the one that best meets their trading needs and preferences.